21220202310223 has 16 divisors (see below), whose sum is σ = 25709203068480. Its totient is φ = 17098168628736.

The previous prime is 21220202310221. The next prime is 21220202310311. The reversal of 21220202310223 is 32201320202212.

It is a cyclic number.

It is not a de Polignac number, because 21220202310223 - 2¹ = 21220202310221 is a prime.

It is a super-3 number, since 3×21220202310223³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21220202310194 and 21220202310203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220202310221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107453236 + ... + 107650537.

It is an arithmetic number, because the mean of its divisors is an integer number (1606825191780).

Almost surely, 2^{21220202310223} is an apocalyptic number.

21220202310223 is a deficient number, since it is larger than the sum of its proper divisors (4489000758257).

21220202310223 is a wasteful number, since it uses less digits than its factorization.

21220202310223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215104626.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21220202310223 its reverse (32201320202212), we get a palindrome (53421522512435).

The spelling of 21220202310223 in words is "twenty-one trillion, two hundred twenty billion, two hundred two million, three hundred ten thousand, two hundred twenty-three".